Tehuantepec Forecast
September 16, 2025, 9:01 am (UTC: -04:00)
Subject: Tehuantepec Forecast
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This forecast has not been reviewed. It was generated from an automatic model.
.WARNINGS.
...TROPICAL STORM WARNING...
.TROPICAL STORM MARIO NEAR 21.9N 115.7W 1000 MB AT 0900 UTC SEP
16 MOVING NW OR 310 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM N
SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 4 M OR GREATER WITHIN
30 NM W SEMICIRCLE...60 NM NE QUADRANT AND 45 NM SE QUADRANT
WITH SEAS TO 4.5 M. ELSEWHERE WITHIN 23N115W TO 23N116W TO
22N117W TO 22N115W TO 23N115W WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0
M. REMAINDER AREA WITHIN 22N114W TO 24N115W TO 23N116W TO 22N117W
TO 21N117W TO 20N115W TO 22N114W WINDS 20 KT OR LESS. SEAS 2.5
TO 3.0 M IN MIXED SWELL.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW MARIO NEAR 24.6N
118.6W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN
25N117W TO 26N118W TO 26N119W TO 25N119W TO 24N119W TO 24N118W TO
25N117W WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW MARIO NEAR 26.3N
120.0W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. CONDITIONS
IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 16N95W TO 16N96W TO 15N96W TO 15N95W TO
15N94W TO 16N95W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 16N95W TO 16N96W TO 15N96W TO 15N95W TO
15N94W TO 16N95W...INCLUDING THE GULF OF TEHUANTEPEC... N WINDS
20 TO 25 KT. SEAS LESS THAN 2.5 M.
FOR THE FORECAST, TROPICAL STORM MARIO WILL MOVE TO 23.2N 117.3W
THIS AFTERNOON, WEAKEN TO A REMNANT LOW NEAR 24.6N 118.6W WED
MORNING, 25.6N 119.5W WED AFTERNOON, 26.3N 120.0W THU MORNING,
26.7N 120.2W THU AFTERNOON, AND DISSIPATE FRI MORNING. ELSEWHERE,
A TROPICAL WAVE IS PRODUCING DISORGANIZED SHOWERS AND
THUNDERSTORMS SEVERAL HUNDRED MILES OFF THE COAST OF SOUTHERN
MEXICO. ENVIRONMENTAL CONDITIONS APPEAR CONDUCIVE FOR ADDITIONAL
DEVELOPMENT OF THIS SYSTEM, AND A TROPICAL DEPRESSION IS LIKELY
TO FORM DURING THE MIDDLE TO LATTER PART OF THIS WEEK AS IT MOVES
WEST-NORTHWESTWARD AT 10 TO 15 MPH OVER THE CENTRAL EAST
PACIFIC. THERE IS A MEDIUM CHANCE FOR TROPICAL DEVELOPMENT IN THE
NEXT 48 HOURS AND A HIGH CHANCE IN THE NEXT 7 DAYS. FRESH TO
LOCALLY STRONG WINDS WILL PULSE IN THE GULF OF TEHUANTEPEC
THROUGH MIDWEEK, WITH MODERATE TO FRESH WINDS PULSING AFTERWARDS.
SHORT-TERM TEHUANTEPEC
TODAY - SSW 4-5, Seas SSW 0-6.9 feet @ 15sec
TONITE - SSW 4-5, Seas SSW 0-6.9 feet @ 15sec
WEDNESDAY - N 6-8, Seas SSW 0-6.5 feet @ 14sec
WEDNESDAY NIGHT - N 6-8, Seas SSW 0-6.5 feet @ 14sec
LONG-TERM TEHUANTEPEC
THURSDAY - E 6-8, Seas SSW 0-6.4 feet @ 14sec
FRIDAY - E 9-11, Seas SSW 1.5-5.7 feet @ 13sec
SATURDAY - SSE 8-10, Seas SW 0-5.2 feet @ 15sec
SUNDAY - ESE 10-12, Seas N/A ?-? feet @ ?
MONDAY - ESE 10-12, Seas N/A ?-? feet @ ?